Muffler for explosive-engines.



A. H. GREWE.

MUFFLER FOR BXPLOSIVE ENGINES.

APPLICATION FILED JAN. 12, 1910.

978,287. Patented Dec. '13, 1910.

TIE; E TIE-- E:

UNITED STATES PATENT OFFICE. 1 a

ALBEn'r n. GREWE, or DES PLAINES, rumors.

MUFFLER FOR EXPLOSIVE-ENGINES.

Specification of Letters Patent.

Application filed January 12, 1910. Serial No. 537,661.

To all whom it may concern:

Be it known that I, ALBEn'r H. GREWE, a citizen of the United States, residin at Des Plaines, in the county of Cook, tate of Illinois, have invented certain new and use ful Improvements in Mufilers for Explosive Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable of the exhaust throu h such a muffler and causing the exhaust from the mufller to be substantially uniform so that the flow of the exhaust gases does not set up any pulsations in the atmosphere A third object of the invention is to provide a muffler of this character with sound insulating means so that the noise of the gases passing through the mufller is also eliminated.

\Vith the above and other objects in view, the invention consists of a casing wherein is held an exhaust tube-of peculiar construction. i

The invention further consists in certain novel details'of construction and combinations of arts hereinafter fully described, illustrated in the accom anying drawings, and specifically set forth in the claims.

In the accompanying drawings, like characters of reference indicate like parts in the several views, and :F igure 1 is a longitudinal sectional view through va mufller constructed in accordance with this invent-ion,

a portion of the interior of the mufiler being shown in elevation while the remainder is shown in section. Fig. 2 is an enlarged de-' tail section taken transversely through the.

of a pipe 13 leading from the exhaust port of the engine to which the mufiler is attached. The opposite or exhaust end of the muffler is also provided with a head 14, the

latter being imperforate. Adjacent the inlet head is a diaphragm 15 suitably secured within the casing 10 and provided with an opening 16. This 0 ening 16 is preferabl near the bottom 0 the mufiler,

the cylin rical casingof which is preferably disposed in a horizontal position. At the opposite or exhaust end of the mufilerthe casing is provided with an opening 17 and in this opening is held an exhaust'nozzle 18. Extending from the o ening 16'to the exhaustnozzle 18 is a spirally wound tube 19 preferably termed the exhaust tube. This 7 Patented-Dec. 13, 1910.

tube is screwed'into the opening 16 before the diaphragm 15 placed in the mufiler and when thetube and diaphragm are in position the exhaust nozzle 18 is screwed on to the exhaust end of the tube, being properly held bymeans of a jam nut 20. Extending across the exhaust tube 19 are a series of retarding or baffle plates 21. These plates are arranged in staggered relation and preferably one centrally disposed plate 1 and two lateral plates alternatewith each other so that the arrangement is quinoilncial.

Each of the retarding plates comprises, a

vane having two portions arranged at an angle to each other with the apex. of the angle directed toward the exhaust end of the pipe, thus having the hollow sides of said plates disposed toward the inlet end of the tube. The spacesurrounding the spiral exhaust tube is packed with some form of sound insulating material such as mineral H wool or the like. I

In the operation of the device the exhaust enters the inlet end of the muffler first flowing through the chamber 'formed between.

the diaphragm 15 and inlet head 11 and thence passing through the opening 16 into the exhaust tube 19. There the exhaust is retarded by the peculiar arran ement of the retarding plates so that it is orced to flow sions have but little efiect owing to the checking and retarding influence of the plates 21.

There has thus been provided a simple and efficient device of the kind described and for the purposespecified.

It is obvious that minor changes may be made in the form and construction of this invention without departing from the material principles thereof. It is not therefore desired to confine the invention to the exact form herein shown and described, but it is wished to include all suchas properly come within the. scope of the appended claims.

' Having thus described the invention, what is claimed'as new, is

1. In a mufiier, a casing having an inlet opening at one end and an exhaust opening at the opposite end, an imperforate spiral tube held in said casing between the inlet and exhaust openings, and sound insulating material packed around said spiral tube and in said casing.

2. In a mufiler, a cylindrical casing having an inlet opening at one end and an exhaust opening at the opposite end, a partition across said casing at the inlet end and havlng an opening therethrough, a spiral tube held in said casing between the partition and exhaust end, one end of the tube 'being connected to the opening in the partition and the other end to the opening in the exhaust end, and sound insulating material packed around said spiral tube.

3. In a muflier, a spiral exhaust tube having retarding plates extendin thereacross, each plate comprising a vane aving a holloi eside disposed toward the inlet end of the tu 4. In a inuflier, a spiral exhaust tube having retarding plates arranged in staggered relation and extending transversely'of said tube, each late comprising" a vane havin a hollow si e disposed toward the inlet end of the tube.

5. In a mufiler, an' exhaust tube having retarding plates extending thereacross, each plate comprising a vane bent to form two portions arranged at an angle to each other, the apex of the angle being directed toward the exhaust end of the tube.

6. In a mufller, a spiral exhaust tube having retarding plates arranged in staggered relation and extending transversely of said tube, each plate comprising a vane bent to form two portions arranged at an angle to each other, the apex of the angle being directed toward the exhaust end of said tube.

7 In a muflier, a cylindrical casing having an inlet opening at one end and an exhaust opening at the opposite end, a partition across said casing at the inlet end having an opening therein, a spiral tube held in said casing between the partition and exhaust end, one end of the tube being connected to the opening in the partition and the other end to the exhaust opening, retarding plates arranged in staggered relation and extending transversely of said tube, each plate comprising a vane having two ortions arranged at an angle to each other, t e apex of the angle being directed toward the exhaust end of the tube, and sound insulating material packed around said spiral tube within the casing. y

In testimony whereof, I afiix my signature, in presence of two witnesses.

, ALBERT H. GREWE.

WVitnesses:

WILLIAM G. \VILLS,

FRED Gnnwn. 

